We have an intranet network of 200 nodes in ip series 192.168....(private IP). We have several intranet applications running on this network. One proxy is configured for INTERNET access. I want to restrict access to internet on specified hours. But at the same time users must be able to access the intranet applications any time.

Could anyone help me with the steps to configure the squid.conf so that intranet applications are always available and internet browsing is possible on specified hours.